Let me start off by saying you really want to know what my secret is.
Answer these economics questions and I'll tell you a secret /biz/
>>1173728
>Coffee
>C O F F E E
>T O F F E E
>T O F E E
>T F E E
>T E E
>T E A
>Tea
>T E A
>S E A
>S U E A
>S U G A
>S U G A R
And, thus, Coffee -> Tea -> Sugar. No need for diagrams or comparative statics analysis.
1) Supply of coffee decreases, demand for tea increases, demand for sugar decreases.
2) (a) Do it yourself, this is simple math
(b) Bus service is an inferior good
>>1173728
Write your mental math out and label it if these are difficult to you
>>1173728
>do my homework
No
>>1173740
This
To add, Bus services are inferior to other goods (i.e. cars, taxi's, uber).